voldemort.utils
Class Entropy

java.lang.Object
  voldemort.utils.Entropy

public class Entropy
extends java.lang.Object

Field Summary

static long

DEFAULT_NUM_KEYS

Constructor Summary

Entropy(int nodeId)
Entropy constructor.

Entropy(int nodeId, long numKeys, boolean verboseLogging)
Entropy constructor

Method Summary

void	generateEntropy(Cluster cluster, java.util.List<StoreDefinition> storeDefs, java.io.File storeDir, boolean opType) Run the actual entropy calculation tool
void	generateEntropy(Cluster cluster, java.util.List<StoreDefinition> storeDefs, java.io.File storeDir, boolean opType, boolean negativeTest) Run the actual entropy calculation tool
static void	main(java.lang.String[] args)

Methods inherited from class java.lang.Object

clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait

Field Detail

DEFAULT_NUM_KEYS

public static long DEFAULT_NUM_KEYS

Constructor Detail

Entropy

public Entropy(int nodeId)

Entropy constructor. Uses DEFAULT_NUM_KEYS number of keys

Parameters:

nodeId - Node id. If -1, goes over all of them. For negative test nodeId must be valid.

Entropy

public Entropy(int nodeId,
               long numKeys,
               boolean verboseLogging)

Entropy constructor

Parameters:

nodeId - Node id. If -1, goes over all of them. For negative test nodeId must be valid.

numKeys - Number of keys

Method Detail

main

public static void main(java.lang.String[] args)
                 throws java.io.IOException

Throws:

java.io.IOException

generateEntropy

public void generateEntropy(Cluster cluster,
                            java.util.List<StoreDefinition> storeDefs,
                            java.io.File storeDir,
                            boolean opType)
                     throws java.io.IOException

Run the actual entropy calculation tool

Parameters:

cluster - The cluster metadata

storeDefs - The list of stores

storeDir - The store directory

opType - Operation type - true ( run entropy calculator ), false ( save keys )

Throws:

java.io.IOException

generateEntropy

public void generateEntropy(Cluster cluster,
                            java.util.List<StoreDefinition> storeDefs,
                            java.io.File storeDir,
                            boolean opType,
                            boolean negativeTest)
                     throws java.io.IOException

Run the actual entropy calculation tool

Parameters:

cluster - The cluster metadata

storeDefs - The list of stores

storeDir - The store directory

opType - Operation type - true ( run entropy calculator ), false ( save keys )

negativeTest - Validate that the rebalanced keys are deleted from the store

Throws:

java.io.IOException